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R. Regmi

Bio: R. Regmi is an academic researcher from Wayne State University. The author has contributed to research in topics: Alloy & Nickel–metal hydride battery. The author has an hindex of 3, co-authored 3 publications receiving 144 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the saturation magnetization of activated metal hydride material and electrode performance was investigated, and the specific power measured at both low temperature (−30°C) and operating temperature (35°C), respectively, was compared with magnetization measurements.

71 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of aluminum substitution to the structural, electrochemical, and gas phase hydrogen storage properties of C14-rich alloys were reported, including minor phases including C15 and TiNi, identified by X-ray diffraction analysis.

50 citations

Journal ArticleDOI
TL;DR: The structural, electrochemical, and gas phase hydrogen storage properties of predominantly C14 crystalline phase alloys with partial replacement by Co (up to 2.5 at%) are reported in this paper.

27 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a review of the specific alloy families developed for high-energy and high-power Ni/MH batteries in the last decades, especially for EV, HEV and PHEV applications, is presented.
Abstract: Hydrogen storage alloys are of particular interest as a novel group in functional materials owing to their potential and practical applications in Ni/MH rechargeable batteries. This review is devoted to the specific alloy families developed for high-energy and high-power Ni/MH batteries in the last decades, especially for EV, HEV and PHEV applications. The scope of the work encompasses principles of Ni/MH batteries, electrochemical hydrogen storage thermodynamics and kinetics, prerequisites for hydrogen storage electrode alloys and recent advances in hydrogen storage electrode alloys. Rare earth AB5-type alloys, Ti- and Zr-based AB2-type alloys, Mg-based amorphous/nanocrystalline alloys, rare earth-Mg–Ni-based alloys and Ti–V-based alloys are highlighted. Additionally, the challenges met in developing advanced hydrogen storage alloys for Ni/MH rechargeable batteries are pointed out and some research directions are suggested.

433 citations

Journal ArticleDOI
TL;DR: In this paper, the progress made in the last few decades on hydrogen storage alloys, such as AB 5 -type, AB 2 -type alloys and Mg-based alloys for nickel-metal hydride (Ni-MH) rechargeable batteries is discussed.

198 citations

Journal ArticleDOI
TL;DR: In this review article, the fundamentals of electrochemical reactions involving metal hydrides are explained, followed by a report of recent progress in hydrogen storage alloys for electrochemical applications.
Abstract: In this review article, the fundamentals of electrochemical reactions involving metal hydrides are explained, followed by a report of recent progress in hydrogen storage alloys for electrochemical applications. The status of various alloy systems, including AB₅, AB₂, A₂B₇-type, Ti-Ni-based, Mg-Ni-based, BCC, and Zr-Ni-based metal hydride alloys, for their most important electrochemical application, the nickel metal hydride battery, is summarized. Other electrochemical applications, such as Ni-hydrogen, fuel cell, Li-ion battery, air-metal hydride, and hybrid battery systems, also have been mentioned.

179 citations

Journal ArticleDOI
TL;DR: In this paper, the structure and mechanical properties of high-entropy alloys after arc melting and annealing at 1200°C for 24-h are investigated, and the experimental phase composition of the alloys is compared with predicted equilibrium phases and the factors governing the transformation of C15 to C14 Laves phases due to Al addition to the CrNbTiVZr alloy analyzed.

96 citations

Journal ArticleDOI
TL;DR: In this paper, the saturation magnetization of activated metal hydride material and electrode performance was investigated, and the specific power measured at both low temperature (−30°C) and operating temperature (35°C), respectively, was compared with magnetization measurements.

71 citations